I have checked all 15 districts in Wausau, Marathon County. I couldn't find your Christian Schmidtz. I didn't even find anything close. Sorry.
For Milwaukee County, have someone look it up that has the 1910 Census index. There are more districts in Milwaukee than Marathon and it will take me for ever to go through it page by page. I know I had said that I would help, I don't care for Milwaukee County. I hope you understand.